Cement Treated Base Curing Temperature PDF Download

Author: George B. Sherman
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 6

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Author: Max L. Alexander
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 32

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Book Description

Author: Gregory E. Halsted
Publisher:
ISBN: 9780893122539
Category : Pavements
Languages : en
Pages : 20

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Book Description
Cement-treated base (CTB) is a general term that applies to an mixture of native soils and/or manufactured aggregates with measured amounts of portland cement and water that is compacted and cured to form a strong, durable, frost resistant paving material. Other descriptions such as soil-cement base, cement-treated aggregate base, cement-stabilized base are sometimes used. This document provides a basic guide on the use of cement-treated base (CTB) for pavement applications. This document provides on overview on the design and construction of CTB for both mixed-in-place and central plant mixed operations. A suggested construction specification is also included.

Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Bridge construction contracts
Languages : en
Pages : 372

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Author: United States. Federal Aviation Administration
Publisher:
ISBN:
Category :
Languages : en
Pages : 600

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Book Description

Author: K.L. Scrivener
Publisher: CRC Press
ISBN: 9780419215707
Category : Architecture
Languages : en
Pages : 474

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Book Description
Deterioration of cement-based materials is a continuing problem, as it results in the substantial shortening of the lives of conventional concrete structures. The main costs result from poor performance and the need for early repair. With more advanced applications, where very long service lives are essential, such as the storage of nuclear waste, an understanding of the degradation processes in order to predict long term performance is very important. this book forms the proceedings of the latest Symposia at the Materials Research Society Autumn meeting in Boston.

Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 25

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Book Description
Introductory technical guidance for civil engineers and construction managers interested in design and construction of concrete pavement for streets and highways. Here is what is discussed: 1. BACKGROUND 2. RIGID PAVEMENT LAYER CONFIGURATION 3. DESIGN CONSIDERATIONS FOR BASE/SUBBASE 4. DESIGN OF BASE/SUBBASE FOR RIGID PAVEMENTS 5. MATERIALS FOR BASE AND SUBBASE 6. CONSTRUCTION OF BASE AND SUBBASE 7. COST CONSIDERATIONS 8. EUROPEAN PRACTICES – A BRIEF SUMMARY.

Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 484

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Author: Nicholas James DeBlasis
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 164

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Book Description
Cement is perhaps the most common soil stabilizer, often blended with soils at various proportions to increase strength and durability. However, there are concerns with regard to the impact of low curing temperature on strength and ultimate performance. The purpose of this study is to determine the impact curing temperature has on the unconfined compressive (UC) strength and stress-strain behavior of cement modified soil as well as to consider methods to improve performance in cold-weather conditions. The data indicate that curing soil-cement at lower temperatures will result in lower strengths. For example, the 7 day strength for samples cured at 25[degrees]F was less than the strength of samples cured at 50[degrees]F or 70[degrees]F by a factor ranging from 2-6. Likewise, the 7 day strength for samples cured at 35[degrees]F was less than the strength of samples cured at 50[degrees]F or 70[degrees]F by approximately 20-25%. Additionally, on the basis of 15 repeat tests for 3 & 7 day curing periods, for three different soils, results indicate that the mean strength at 3 days is 84-93% of that for 7 days, in support of a potential change in current subgrade evaluation practice predicated on the longer duration. The use of a calcium chloride (CaCl[subscript]2) solution as the molding moisture content was found to increase the UC strength by 20% for one soil/temperature condition but generally resulted in decreased strength at the concentration range (0.5 - 3.0%) tested. The use of CaCl[subscript]2 solution had a mixed impact on the maximum dry density (MDD), with overall changes between 2-3% of the MDD of the unmodified soil-cement control. Similarly, the optimum moisture contents (OMC) were generally within [plus or minus]2% of the OMC of the control. Analysis of the data suggests a threshold concentration for CaCl[subsript]2 efficacy, beyond which diminishing benefit transitions to deleterious performance.

Author: Masaki Kitazume
Publisher: CRC Press
ISBN: 1498785492
Category : Science
Languages : en
Pages : 250

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Book Description
The pneumatic flow mixing method was developed to stabilize dredged soil and surplus soil for promoting their beneficial use in 1999. The pneumatic flow mixing method is a new type of the ex-situ cement stabilization techniques, in which dredged soil and surplus soil is mixed with a relatively small amount of chemical binder without any mixing paddles and blades in a pipeline. When a relatively large amount of compressed air is injected into the pipeline, soil can be separated into small blocks. When binder is injected into the pipeline, the soil block and binder are thoroughly mixed by means of turbulent flow generated in the soil block during transporting. As this method has many benefits − rapid and large scale execution can be conducted with low cost − it has been applied to many land reclamation projects, backfilling behind earth retaining wall projects and shallow stabilization projects using dredged soils and surplus soils. The Pneumatic Flow Mixing Method is a useful reference tool for engineers and researchers involved in admixture stabilization technology everywhere, regardless of local soil conditions and a variety in applications.